Stool



FIG. 1 is a general perspective view of the stool embodying the present invention;

FIG. 2 is a front elevation of the stool shown in FIG. 1;

FIG. 3 is a rear elevational view of the stool shown in FIG. 1;

FIG. 4 is a left side elevational view of the stool shown in FIG. 1, the right side being a mirror image thereof; and,

FIG. 5 is a top plan view of the stool shown in FIG. 1.

The bottom of the stool forms no part of the claimed design. 

The ornamental design for a stool, as shown and described. 